Internal Leak Test - Bosch RG8.0 Originalbetriebsanleitung

en 36 | RG8.0 / RG4.0 | Troubleshooting
Symptom / Checklist
Problem
Check inlet (A/C or re-
Poor
recovery rate frigeration sys-
tem) pressure
Check basic operation Close the
Check for leaks
in hoses and con-
nections
Check Internal sys-
tem leakage.
The internal leak
test fails.
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F 002 DG9 H00 2018-08-17
Cause/Action
Symptom /
Problem
Observe pressure on
The
inlet gauge (Blue). RG8.0 / RG4.0
If A/C or refrigeration
does not re-
system has
cover refriger-
normal pressure,
ant even though
proceed to the it is running
next step.
RG8.0 / RG4.0
inlet valve. If the
RG8.0 / RG4.0
pulls into vacuum
and shuts-off, pro-
ceed to next step.
Open the
RG8.0 / RG4.0
inlet valve, close on-
ly A/C or refrigeration
system service valves.
If RG8.0 / RG4.0 pulls
down to Vacuum pro-
ceed to next step.
Perform internal leak
test as
described in the
section 7.2
Contact Bosch cus-
tomer service.
7.2
In the event that internal leakage is suspected the fol-
lowing test can be performed to confirm or deny.
1. With nothing connected to the RG8.0 / RG4.0, en-
sure the recovery / purge valve is in the RECOVER
position.
2. Open the inlet valve and close the outlet valve.
3. Start the RG8.0 / RG4.0 and allow it to run until it
shuts off due to HP cut-out.
4. Close the inlet valve. Blue gauge should indicate zero
bar and high approximately 38.5 bar.
5. Slowly turn the recovery / purge valve from
RECOVER to PURGE position.
 The pressure should drop on the red gauge and
 Note the values and watch the gauges for change
Checklist
Make sure that
black knob on the
RG8.0 / RG4.0 is in
RECOVER
posi-
tion (pointing up).
Check for obstruc-
tions and / or freeze
up in inlet line.
Check pressure differ-
ential between inlet
gauge and
manifold gauge.
Visually inspect
inlet filter
adapter and
filter drier for
obstructions
The hoses connecte-
to the RG8.0 / RG4.0
have no obstruc-
tions - the basic op-
eration test fails

Internal leak test

rise on the blue gauge, settling at approximately
equal values.
over the next 30 seconds. If there is no significant
pressure drop on either side, the internal
integrity is confirmed.
Bosch Automotive Service Solutions GmbH
Cause/Action
If not, close the
RG8.0 / RG4.0
inlet valve, and when
RG8.0 / RG4.0 shuts
off (LP cut-out), slow-
ly move knob to
RECOVER
position.
Close the
RG8.0 / RG4.0
inlet valve and allow
the RG8.0 / RG4.0
to shut-off (LP cut-
out activation). Fol-
low the instructions
in chapter 6.2 for
purging refrigerant
If there is a pressure
differential, the inlet
filter is blocked or the
inlet mesh screen is
blocked. Could be ice
or dirt. Follow instruc-
tions for purging the
RG8.0 / RG4.0, then
proceed to next step
Replace and re-
assemble filters.
Test basic opera-
tion as described
in the section 7.1.
Contact Bosch cus-
tomer service.